Nucleic acid testing is also required for patients recovering from a new crown. Patients recovering from a new crown need to be discharged from the hospital and continue home health monitoring for 7 days. In addition, patients still need to go to the hospital regularly for review to see if their nucleic acid test is negative. If clinical symptoms related to the respiratory system recur during the isolation period, the new crown nucleic acid test and, if necessary, lung CT and blood tests should be repeated. Patients who have recovered from neocoronavirus have antibodies against neocoronavirus in their bodies, but as time passes, the level of antibodies in recovered neocoronavirus patients will begin to decline, and if they come into close contact with people who have neocoronavirus or are in environments where neocoronavirus is present, it may lead to re-infection of the virus, and therefore nucleic acid testing is needed. New coronavirus can be transmitted through the respiratory tract, etc. You should pay attention to wearing masks when you go out, washing your hands frequently, and avoiding close contact with patients with respiratory tract infections.